Video signal output device

Abstract

When television screen setting is not set and thus a television screen setting completion flag is not set, and a terminals-connection judgment pin takes a low level, an i/p selection screen is initially displayed on a progressive display device. However, the i/p selection screen is not displayed on an interlaced display device. When processing performed for the i/p selection screen is completed, or when the terminals-connection judgment pin takes a high level, indicating that the video input D-terminal of the display device is not connected to the video output D-terminal, an aspect ratio setting screen is displayed. After aspect ratio setting is completed, the television screen setting completion flag is set. This eliminates the need to perform the television screen setting again.

1. A video signal output device, comprising:
 a video signal conversion circuit that converts an inputted video signal into an interlaced video signal or a progressive video signal; 
 a video output circuit that outputs the video signal converted by the video signal conversion circuit to a display device; and 
 a control portion, wherein 
 the video output circuit outputs to the control portion a connection presence/absence indicating signal for judging whether or not a predetermined video input terminal of the display device is connected to a predetermined video output terminal, and 
 the control portion includes
 interlacing/progressive selection screen display means that, when interlacing/progressive setting and aspect ratio setting are performed through a dialog to suit television screen setting of the display device, causes the display device to display an interlacing/progressive selection screen if a television screen setting completion flag indicating completion of the television screen setting is not set, and it is judged that the predetermined video input terminal of the display device is connected to the predetermined video output terminal, 
 aspect ratio setting screen display means that, after interlacing/progressive setting is completed by means of the interlacing/progressive selection screen, or if it is judged that the predetermined video input terminal of the display device is not connected to the predetermined video output terminal, causes the display device to display an aspect ratio setting screen for setting an aspect ratio for the display device, and 
 flag setting means that sets the television screen setting completion flag when the aspect ratio is set by means of the aspect ratio setting screen and thus the television screen setting is completed. 
 
 
     
     
       2. The video signal output device of  claim 1 , wherein
 the predetermined video output terminal has a terminals-connection judgment port that takes one level when the predetermined video input terminal of the display device is connected to the predetermined video output terminal, and that takes another level when the predetermined video input terminal is not connected to the predetermined video output terminal, and 
 the video output circuit outputs the connection presence/absence indicating signal to the control portion via the terminals-connection judgment port. 
 
     
     
       3. The video signal output device of  claim 2 , wherein
 the control portion further includes
 interlacing/progressive setting means that, after the interlacing/progressive selection screen is displayed, if progressive setting is selected within a predetermined time, sets a video output of the video output circuit to progressive, and, if progressive setting is not selected within the predetermined time, sets a video output of the video output circuit to interlacing, 
 test video image display means that causes the display device to display a test video image with an aspect ratio of 16:9 if a time elapsed after a start of the aspect ratio setting is within a predetermined time, and 
 aspect ratio setting means that, if it is judged that a figure displayed in a center of the test video image is a circle, sets a screen to a widescreen with an aspect ratio of 16:9, and, if the time elapsed after the start of the aspect ratio setting exceeds the predetermined time, or if it is judged that the figure displayed in the center of the test video image is an ellipse, sets the screen to a letterboxed screen with an aspect ratio of 4:3. 
 
 
     
     
       4. The video signal output device of  claim 1 , wherein
 the control portion further includes
 interlacing/progressive setting means that, after the interlacing/progressive selection screen is displayed, if progressive setting is selected within a predetermined time, sets a video output of the video output circuit to progressive, and, if progressive setting is not selected within the predetermined time, sets a video output of the video output circuit to interlacing, 
 test video image display means that causes the display device to display a test video image with an aspect ratio of 16:9 if a time elapsed after a start of the aspect ratio setting is within a predetermined time, and 
 aspect ratio setting means that, if it is judged that a figure displayed in a center of the test video image is a circle, sets a screen to a widescreen with an aspect ratio of 16:9, and, if the time elapsed after the start of the aspect ratio setting exceeds the predetermined time, or if it is judged that the figure displayed in the center of the test video image is an ellipse, sets the screen to a letterboxed screen with an aspect ratio of 4:3.